/* ============================================================
   SpeedyInv Admin — Layout (Sidebar, Topbar, Content)
   ============================================================ */

:root {
    --si-sidebar-width: 260px;
    --si-sidebar-collapsed: 0px;
    --si-topbar-height: 60px;
}

/* --- Wrapper --- */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar --- */
.admin-sidebar {
    width: var(--si-sidebar-width);
    min-height: 100vh;
    background: var(--si-bg-sidebar);
    border-right: 1px solid var(--si-sidebar-border);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1040;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

/* Sidebar Header / Brand */
.sidebar-brand-area {
    padding: 1.125rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--si-sidebar-border);
    flex-shrink: 0;
}

.sidebar-brand-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    color: var(--si-text);
    font-weight: 700;
    font-size: 1.125rem;
}

.sidebar-brand-link i {
    font-size: 1.35rem;
    color: var(--si-primary);
}

.sidebar-admin-badge {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 0.15rem 0.5rem;
    border-radius: 9999px;
    background: var(--si-danger-subtle);
    color: var(--si-danger-text);
    text-transform: uppercase;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0;
}

.sidebar-section-label {
    padding: 1rem 1.25rem 0.375rem;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--si-sidebar-section);
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1.25rem;
    margin: 1px 0.5rem;
    border-radius: 0.5rem;
    color: var(--si-sidebar-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.12s ease;
}

.sidebar-nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.05rem;
    flex-shrink: 0;
}

.sidebar-nav-link:hover {
    background: var(--si-sidebar-hover-bg);
    color: var(--si-text);
}

.sidebar-nav-link.active {
    background: var(--si-sidebar-active-bg);
    color: var(--si-sidebar-text-active);
    font-weight: 600;
}

/* Sidebar Footer */
.sidebar-footer-area {
    padding: 0.75rem 0;
    border-top: 1px solid var(--si-sidebar-border);
    flex-shrink: 0;
}

/* --- Main Content Area --- */
.admin-main {
    flex: 1;
    margin-left: var(--si-sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Topbar --- */
.admin-topbar {
    height: var(--si-topbar-height);
    background: var(--si-bg-topbar);
    border-bottom: 1px solid var(--si-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 1030;
    box-shadow: var(--si-shadow-sm);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topbar-left .page-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--si-text);
    margin: 0;
}

.topbar-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--si-text-muted);
}

.topbar-breadcrumb a {
    color: var(--si-text-muted);
    text-decoration: none;
}

.topbar-breadcrumb a:hover {
    color: var(--si-primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Topbar Buttons */
.topbar-icon-btn {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    border: none;
    background: transparent;
    color: var(--si-text-secondary);
    cursor: pointer;
    transition: all 0.12s ease;
    position: relative;
}

.topbar-icon-btn:hover {
    background: var(--si-bg-hover);
    color: var(--si-text);
}

.topbar-icon-btn .badge-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--si-danger);
    border: 2px solid var(--si-bg-topbar);
}

/* User avatar in topbar */
.topbar-user-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem 0.25rem 0.25rem;
    border-radius: 9999px;
    border: 1px solid var(--si-border);
    background: var(--si-bg-surface);
    color: var(--si-text);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.12s ease;
}

.topbar-user-btn:hover {
    border-color: var(--si-primary);
}

.topbar-user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--si-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Sidebar toggle (mobile) */
.sidebar-toggle-btn {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--si-text-secondary);
    cursor: pointer;
    border-radius: 0.5rem;
    font-size: 1.25rem;
}

.sidebar-toggle-btn:hover {
    background: var(--si-bg-hover);
}

/* --- Content Area --- */
.admin-content {
    flex: 1;
    padding: 1.5rem;
}

/* --- Responsive --- */
@media (max-width: 991.98px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    .admin-sidebar.show {
        transform: translateX(0);
        box-shadow: var(--si-shadow-lg);
    }
    .admin-main {
        margin-left: 0;
    }
    .sidebar-toggle-btn {
        display: inline-flex;
    }
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1035;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.show {
    display: block;
}

/* --- Page Header --- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--si-text);
}

.page-header .page-subtitle {
    font-size: 0.875rem;
    color: var(--si-text-muted);
    margin: 0.125rem 0 0;
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Grid helpers --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.cards-grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.cards-grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}